The glazier is not necessarily a tiresome man because he "gives you a pane."
"I expend a good deal of panes at my work," as the glazier said to the window-sash.
So the "patient toil and vigil long" of poor Glazier went for nothing.
Glazier immediately turned and inquired, "Do you know who I am?"
Glazier and his comrade left the spot inspired with renewed courage.